/Engine/Source/Editor/Sequencer/Public/ISequencer.h
Should be called after adding a track to the MovieScene. This will set the specified track as your current selection cause it to throb, notify the sequence to rebuild any data required. The track will be added to the selected folder unless ObjectBinding points to a validFGuid.
void OnAddTrack ( const [TWeakObjectPtr](API\Runtime\Core\UObject\TWeakObjectPtr)< [UMovieSceneTrack](API\Runtime\MovieScene\UMovieSceneTrack) > & InTrack, const [FGuid](API\Runtime\Core\Misc\FGuid) & ObjectBinding )